Grinding-mill



(No Model.) 2 sheets sheet 1.

J. O. WOODCOCK.

GRINDING MILL.

Patented'Mar. 3, 1891.

WIZJVESSES %Jv dilormy.

J; c. WOODCOCK,

2 Sheets-Sheet 2.

GRINDING MILL.

(No Model.)

No. 447,596. Patented Mar. 3, 1891.

W12 WESSES W4;

UNITED STATES FFIQE.

JOHN C. IVOODOOOK, OF NEW LEXINGTON, OHIO.

GRINDING-MILL.

SPECIFICATION forming part of Letters Patent No. 447,596, dated March 3, 1891.

Application filed April 15, 1889. Serial No, 307,255. (No model.)

To CLZZ whom it may concern..-

Be it known that I, JOHN C. WOODCOCK, a citizen of the United States, residing at New Lexington, in the county of Perry and State of Ohio, have invented a certain new and useful Improvement in Grinding-Mills, of which the following is a full, clear, and exact description.

The object of this invention is to provide a mill for use for grinding feed for stock and for other farm or domestic purposes.

The invention consists in certain details of construction and in-the combination and arran gement of parts, as I will proceed now more particularly to set forth, and finally claim.

In the accompanying drawings, illustrating my invention, in the several figures of which like parts are similarly designated, Figure 1 is a sectional elevation; Fig. 2, abottom plan with the bridge-tree and portion of the feedtrough and conveyer broken away, and the remaining figures show in detail various parts, as follows: Fig. 3, a perspective of bridge-tree, spindle, and stirrup; Fig. 4, a perspective View of the joint for connecting the shell and casing; Fig. 5, an elevation of the stirrup; Figs. 6 and 7, perspective views, respectively,of parts of the shell and cone or runner, showing one form of teeth 5 Figs. 8 and 9, perspective views, respectively, of the shell and cone or runner, showing another form of teeth; Fig. 10,a perspective view of joint for feed-trough and casing; Fig. 11, a plan of a portion of the dome,

showing a preferred form of crushing-teeth; Fig. 12, aperspective view showing the application of knives or cutters to the spiders; Fig. 13, a perspective view showing joint of dome and runner; Fig. 14:, a plan of movable and stationary spiders, omitting the knives; Fig. 15, a sectional elevation of a portion of the two spiders; Fig. 16, a perspective of a leg and its socket, and Fig. 17 a cross-section of leg and socket. Fig. 18 shows the teeth in elevation and plan.

A is the casing, preferably frusto-conical in shape and supported upon legs B, which legs by preference have wedge-shaped ends B, which are fitted in corresponding sockets C, made in the outside of the casing A, substantially as shown in Figs. 16 and 17. \Vithin the lower portion of this casing is fitted the shell D. Within the inside of the casing I make a bayonet-joint shaped socket a, the

locking end a of which extends in the direc tion of rotation of movable parts, and upon the outer surface of the shell D, I provide lugs (1, which are adapted to interlock with the sockets a, to retain the shell in place. (See details, Fig. 4.) By this construction the shell may be quickly and securely inserted and held in place in the casing.

The top of the casing has applied to it or cast with it the stationary spider E, and this spider consists of a series of arms b, which have depending from them teeth 0, and also have rising from their upper surfaces similar teeth d, and this spider has an opening or hub e to form the upper bearing for the shaft of the rotating dome and runner. The rotating spider F is supported above the stationary spider and is keyed or otherwise fastened to the shaft of the dome, as will presently appear. This rotating spider is provided with a depending flange f, which restsupon the upper surface of the casing A, and I prefer to form the flange f on said rotating spider with a grooved way f to fit a band g, encircling the casing A and the rotating spider, although I. do not limit my invention in this particular to the employment of this means for effecting a connection between the rotating spider and the casing. This rotating spider has projecting arms f for ,use in applying a horse-power or other motor in any well-known way. The rotating spider is provided on its under surface with depending teeth f, the teeth f and the teeth (Z of the spiders co-operating to initially crush the substance to be ground.

In some cases it may be desirable to have knives or cutters applied to the spiders in order to assist in the preliminary crushing or severing of the material to be ground. For

this purpose I may provide the said spiders with sockets h to receive the knives h, the

sockets opening in the direction of rotation, 95

details of above forms in Fig. 12.) The mill 109 may be put upon the market with the knives in place, or such knives maybe furnished as attachments to the mill to be used at pleasure. The rotating spider is surmounted by the hopper G.

The runner or cone II is a frusto-conical annulus adapted to be fitted into the shell by insertion from below or by dropping the shell over the runner. This runner is made in one piece, and is provided with teeth and rubbers and feeders of preferred form, as will be described presently.

The dome I, of usual shape, is provided with teeth 1' on its upper surface and with the dome shaft J, which extends up through the hub c of the stationaryspider, and is provided with means, say athreaded portionj and nuts j and 7' to secure the movable spider and to suspend the dome from such spider. The dome and the runner are connected by bayonet-joints 7.x, which, like the bayonet-joints connecting the shell and the casing, extend in the direction of rotation of the dome, so as to securely lock the dome and runner together while in operation. The dome is connected to the runner, as before stated, and I deem no other fastening device necessary than the bayonet-V joints, although it may be desirable in trans porting the mill to provide by auxiliary fastcnings against the jarring apartof the members. This, however, rarely, if ever, will be necessary, because the parts are securely held. The dome and its attached runner and the attached movable spider are furthersu pported from below by a dead-spindle K, the said dead-spindle being arranged within a socket j in the base of the shaft J or the top of the dome, and being held from rotation within a square socket Z in the bridge-tree L. The bridge-tree L is supported from the casing A by means of stirrup-boltsM, engaging notches Z in the ends of the bridge-tree, and extend in g up through lugs m on the casing and fastened by nuts it. Instead of projecting the lugs m from the casing at the point shown in full lines in Fig. 1, the said lugs may be arranged on the base-flange m. of the casing A, as shown at m in dotted lines at the righthand side of Fig. 1. This latter construct-ion will permit the use of shorter stirrups and will be equally effective in supporting the bridge-tree and adjusting it so as to adjust the runner, and thus vary the fineness of the product. i

N is the feedtrough, made as an annulus and of substantially the outline indicated in Fig. 1. This feed-trough is secured to the casing by means of lugs 0 on it engaging L shaped brackets 0 depending from the easing, spring-keys or other devices 0 being passed through the base-flange m of the easing A and the lugs 0 to securely lock the parts. (See details, Fi 10.) The feed-trough is provided with a discharge-orifice p. \Vithin the feed-trough is arranged the conveyor 0, which is composed of a rectangular rim q, having bearings upon the feed-trough at q and (1 so as to run smoothly therein. This conveyer is also provided with wings g of substantially the outline of the trough and fitted therein. The conveyor is connected to and moved by the runner by means of lugs a rising from said conveyor and engaged by lugs projecting from the inside of the runner at right angles to the lugs 0'. By thus connecting the conveyer and the runner it may be readily separated therefrom and as readily applied thereto, and thus all necessity for screws or bolts or other fastenings is obviated.

I have shown two forms of teeth for the cone or runner and shell, one of which, that shown in Figs. 6 and 7, may be described as V-shaped, and the other of which, that shown in Figs. 8 and 9,1nay be described as saw tooth shaped; but both forms may be designated generally as triangular in cross-section. The teeth S are arranged in series between rubbers 5, each series comprising a number of ribs of different upward extension upon the runner and having their greater depth at the bottom of the runner and then running out to nothing at their upper ends. These ribs slant in the direction of rotation and their effective or cutting edges 5 stand outwardly from the surface of the runner and with a backward slant 5 so as to be selfclearing, and thus diminish the draft and hence increase the capacity of the machine. The teeth S upon the shell are the complements of the runner-teeth. The rubbers on the runner are extended above the upper line of the runner and subseiwe the purpose of feeders to impel the stuff being ground down between the cone and shell. Such feeders are designated 3'. These feeders are assisted by other feeders s on the cone or runner cooperating with similar feeders t on the shell, and I prefer to extend the feeders of the shell up to the top of the casing, and thereforeprovide said casing with such extended feeders as indicated at t in Figs. 1 and 12.

The teeth on the dome and on the spiders arepyramidsapproximatelyofdiamondshape, with their active ends cut away so as to afford three cutting-edges, as indicated at 17,1 and i in Fig. 11. This construction of teeth will be found to give excellent results in the preliminary breaking up of the material to be ground, and this is notably true with corn on the cob and with wet or damp stuff.

It will be observed that by means of the fastenings employed and of the construction, generally, of the machine, such machine may be readily assembled and as readily taken apart, and the absence of bolts is especially worthy of notice.

hat I claim is- 1. In a grinding-mill, the casing and a shell arranged therein, the two being united solely by means of bayonet-joints, the members of which are fixed upon and concealed between the casing and shell and which look in the direction of rotation of the runner, substantially as described.

In a grinding-1nill, the runner and the dome connected solely by bayonet-joints concealed upon the inside and interlocking in the direction of rotation of the runner, substantially as described.

3. In a grinding-mill, the meal or feed trough combined with the casing and lugs 0, projecting from one of these members and interlocking with L-shaped lugs 0, projecting from the other member, substantially as described.

4. In a grinding-mill, the runner and the dome inserted in said runner from below, the two being connected solely by bayonet-joints concealed upon the inside and interlocking in the direction of rotation of the runner, and the dome having a socket in its inner face combined with a bridge-tree having an annular step or socket, and a dead-spindle held rigidly and stationarily in the bridge-tree and fitted in the dome-socket to permit the rotation of the dome and runner thereon, and a rotating spider to which the domejs secured, substantially as described.

5. In a grinding-mil], the feed-trough combined with the conveyer having a rectangular rim, with a bearing g on the upper inner edge of the feed-trough, and a second bearing near the bottom of such trough, whereby the conveyer is supported upon the feedtrough with its wings out of contact with the trough, so that it may be rotated freely, sub stantially as described.

6. The runner having the series of teeth and interposed rubbers, the said teeth being of different lengths from the bottom of the runner upwardly, and having their greater depth at the bottom and running out to nothin g at their upper ends, slanted lengthwise in the direction of rotation, and having their cutting-edges slanting rearwardly and being substantially triangular in cross-section, substantially as shown and described.

In testimony whereof I have hereunto set my hand this 11th day of April, A. D. 1889.

JOHN G. .IVOODOOCK. \Vitnesses:

SAMUEL A. COWAN, EDWARD J. GREELY. 

